System and method for producing a sample having a monotonic doping gradient of a diffusive constituent or interstitial atom or molecule

摘要

A sample of a chemical compound is contained within a pressure controlled atmospheric chamber that is set to a predetermined atmospheric pressure. The sample includes a parent material and one or more diffusive atomic or molecular constituents or interstitials. The sample is in thermal contact with a heat source having a first temperature and a heat sink having a second temperature. The sample is annealed until an equilibrium gradient distribution of the diffusive atomic or molecular constituents or interstitials occurs along the sample.

主权项

1. A method comprising the step of:
annealing a sample of a chemical compound contained within a pressure controlled atmospheric chamber, wherein the sample comprises a parent material and one or more of at least one of diffusive atomic and molecular constituents, wherein one end of the sample is in physical contact with and held in place only by a heat source having a first temperature and the other end of the sample is in physical contact with and held in place only by a heat sink having a second temperature, wherein the second temperature is lower than the first temperature, until an equilibrium gradient distribution of the diffusive atomic or molecular constituents occurs along the sample such that the equilibrium gradient distribution varies along a length of the sample and is uniform across a given cross-section of the sample.